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Method and device for determining the quality of a speech signal

  • US 20040078197A1
  • Filed: 11/25/2003
  • Published: 04/22/2004
  • Est. Priority Date: 03/13/2001
  • Status: Active Grant
First Claim
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1. Method for determining, according to an objective speech measurement technique, the quality of an output signal (Y(t)) of a speech signal processing system with respect to a reference signal (X(t)), which method comprises a main step of processing the output signal and the reference signal, and generating a quality signal (Q), wherein the processing main step includes:

  • a first scaling step (S(Y+Δ

    );

    S(Y+Δ

    i), with i=1,2) for scaling a power level of at least one signal of the output and reference signals by applying a first scaling factor which is a function of a reciprocal value of a first power related parameter of the at least one signal, and a second scaling step carried out by applying a second scaling factor (Sα

    (Y+Δ

    );

    Sα

    i
    (Y+Δ

    i), with i=1,2;

    Vα

    3
    (Y+Δ

    3, t);

    Vα

    3
    (Y+Δ

    3)) which is a function of a reciprocal value of a second power related parameter of the at least one signal, using at least one adjustment parameter (α

    ,A;

    α

    i

    i with i=1,2;

    α

    3

    3).

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